Today Chemistry students began learning about sig figs and scientific notation.  Sig figs are something that most students never learn to appreciate, but are very valuable when expressing the precision of measurements.   As a result, we will be measuring on a variety of devices and learning how to express precision in accurate ways.  Scientific notation allows us to express large and small numbers in concise ways.  While expressing numbers using scientific notation is easy to grasp, learning how to use this notation on calculators can be a challenge.  I look forward to working with high school students as they learn how to utilize their calculators in chemistry.